GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Century (China) (CNG) 🢒 Engine 🢒 Engine Mechanical - 3.0L (L46) 🢒 Exhaust Manifold Cleaning and Inspection

    Object Number: 230137 Size: SH
  1. Inspect the exhaust manifold mating surface for flatness.
  2. Inspect the exhaust manifold for cracks or damage.

    3. Replace the exhaust manifold if necessary.